An adaptive control scheme for stabilizing TCP

Following the observations of many researchers that the performance of various AQM (active queue management) schemes is sensitive to parameter variations, we propose stabilizing controllers that adapt to unknown or slowly varying parameters such as load factor, round trip time and link capacity. Our adaptive controllers are designed using new advances in control techniques and achieve asymptotic convergence to a desired equilibrium point. The proposed state feedback controller is designed using feedback linearization and back-stepping technique. A filter based design is proposed for adaptive output feedback control.